JP5781912B2 - Rice transplanter - Google Patents

Description

  The present invention relates to rice transplanter technology. More specifically, the present invention relates to the technology of a rice transplanter including a center float and side floats arranged on both sides of the center float.

  Conventionally, a rice transplanter for planting a seedling in a farm field while running is known. Such a rice transplanter is provided with a working machine for planting a seedling in a field, and a float for leveling the field and raising and lowering the working machine to adjust the planting depth of the seedling.

  In general, a rice transplanter including a center float disposed in a central portion of a work machine and side floats disposed on both sides of the center float is known (see, for example, Patent Document 1). However, in a rice transplanter equipped with a center float and side floats arranged on both sides of the center float, an uneven terrain portion is formed between the center float and the side float, so a clump or wheel that the center float has pushed away There was a case where the soil blocks such as the traces could not be leveled. For this reason, there was a problem that weeds grew on the soil mass that appeared on the surface of the water. Further, when the gap between the center float and the side float is narrowed, the water flow that flows around these floats (water flow that flows backward from the front of the center float and the side float around the side of these floats) is strengthened. For this reason, there also existed a problem that the water flow which flows around a float will defeat the seedling planted.

  On the other hand, a rice transplanter in which a center float and side floats arranged on both sides of the center float are integrally formed is known (see, for example, Patent Document 2). By forming the center float and the side float as one body, the undeveloped land portion is eliminated, and the soil blocks and the like that the center float has pushed away can be leveled. However, in a rice transplanter in which a center float and side floats arranged on both sides of the center float are integrally formed, the float floats under the resistance of water stretched on the field, and the seedling planting depth In some cases, the thickness could not be adjusted appropriately. This is because the amount of water passing below the float changes due to unevenness in the field, etc., and as the left and right dimensions of the float become longer, the left and right heights differ. Furthermore, since the water flow around the float (the water flow that detours the side from the front of the float and flows backward) is strong, there is a problem that the planted seedlings are brought down.

JP-A-7-284315 JP 2005-333820 A

  The present invention, in a rice transplanter comprising a center float and side floats arranged on both sides of the center float, can level soil blocks such as soil blocks and wheel marks that have been displaced by the center float, and these floats. The purpose is to provide a technology that can weaken the water flow around.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

The invention according to claim 1 is a rice transplanter comprising a center float and side floats arranged on both sides of the center float, wherein the center float extends from the main body of the center float to the side float side. by having a bulge portion, a shape warped the traveling direction side end portion of the bulging portion upward, the clod of the body portion is displaced constructed evenly Suyo, of the bulging portion of the center float According to the position, a concave portion is formed at a side end portion of the side float, and the bulging portion of the center float and the concave portion of the side float are arranged to face each other.

  In the invention according to claim 2, the center float has a thin plate shape in the vicinity of the bulging portion with the side float to ensure a water flow path.

According to a third aspect of the present invention, the center float forms a portion of the bulge portion, thereby increasing the buoyancy of the center float and causing water to flow on the upper surface of the thin plate-shaped portion of the bulge portion. The load of the center float is increased, and the increase amount of the buoyancy and the increase amount of the load are balanced .

  As effects of the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the leveling range of the center float can be expanded by having the bulging portion extending from the main body portion of the center float to the side float side. As a result, it is possible to reduce the rough terrain portion formed between the center float and the side float, and to level the soil blocks such as the soil blocks and wheel marks that have been pushed away by the center float.
In addition, since the end portion in the traveling direction of the bulging portion is warped upward, it is possible to level the earth lump that the main body portion of the center float is displaced by the bulging portion. By these, the problem that weed grows in the soil block which appeared on the water surface can be improved.
In addition, a concave portion is formed in the side end portion of the side float in accordance with the position of the bulging portion of the center float, and the bulging portion of the center float and the concave portion of the side float are disposed so as to face each other. A gap channel is formed in a portion where the bulging portion and the concave portion face each other, and water can be passed between the center float and the side float.
As a result, the water flow is blocked by the center float and the side float, and the water on the front side of the center float and the side float flows to both sides of the side float to form a water flow that goes around the float. The trouble of pushing down the stock can be eliminated.
In addition, a concave portion is formed in the side end portion of the side float in accordance with the position of the bulging portion of the center float, and the bulging portion of the center float and the concave portion of the side float are arranged to face each other. The bulging part of the center float and the side float do not interfere with each other.
In addition, the rice transplanter provided with the center float and the side floats arranged on both sides of the center float appropriately adjusts the planting depth of the seedlings as compared with the rice transplanter integrally forming the center float and the side float. It is possible to adjust to.

  According to invention of Claim 2, the flow path of water can be ensured widely by making the proximity | contact part with the side float of the bulging part into the thin plate shape. Thereby, it can weaken the water flow (water flow which flows into the back by detouring the side of these floats from the front of a center float and a side float) around these floats, and it can prevent that the planted seedling falls down.

  According to the third aspect of the present invention, an increase in buoyancy due to the shape in which the end portion in the traveling direction of the bulging portion is warped upward, and a load caused by water flowing on the upper surface of the thin plate-shaped portion of the bulging portion. By balancing the increase in the center float, the behavior of the center float can be stabilized. Thereby, a center float etc. can raise / lower a working machine correctly, and it becomes possible to adjust the planting depth of a seedling suitably.

The side view which shows the whole rice transplanter structure. The side view which shows the structure of a working machine. The perspective view which shows a center float and a side float. The top view which shows a center float. The front view which shows a center float. The side view which shows a center float. The rear view which shows a center float. The perspective view which shows the condition where the bulging part of a center float is leveling the clot.

  First, a rice transplanter 100 according to an embodiment of the present invention will be described. Below, although the 4-row planting rice transplanter 100 is demonstrated, it does not limit the number of strips.

  FIG. 1 is a side view showing the overall configuration of the rice transplanter 100. FIG. 2 is a side view showing the configuration of the work machine 2. In addition, the arrow F in the figure indicates the traveling direction of the rice transplanter 100.

  The rice transplanter 100 is an agricultural machine that plants the seedling S in a field while traveling. The rice transplanter 100 includes a traveling machine body 1, a work machine 2, and a lifting link mechanism 3.

  The traveling machine body 1 mainly includes a vehicle body frame 11, an engine 12, a transmission 13, a front axle 14, a rear axle 15, a cockpit 16, a front wheel 17, and a rear wheel 18.

  The body frame 11 is a main structure of the rice transplanter 100. The body frame 11 forms the skeleton of the rice transplanter 100, and is mounted with an engine 12 and the like.

  The engine 12 is a power source that generates power by burning fuel. The engine 12 can change the operating state when the operator operates the shift pedal 161 or the like.

  The transmission 13 is a power transmission device that performs forward / reverse switching and shifting of the rice transplanter 100. The transmission 13 includes a continuously variable transmission (HMT or HST) that uses hydraulic oil as a power transmission medium. The continuously variable transmission (HMT or HST) can convert part or all of the input rotational power into hydraulic oil pressure and output the hydraulic oil pressure as rotational power again.

  The front axle 14 is a power transmission device that transmits the power of the engine 12 to the front wheels 17. The power of the engine 12 is input to the front axle 14 via the transmission 13. The front axle 14 is provided with a steering device, and the front wheel 17 can be steered by operating the handle 162 by the operator.

  The rear axle 15 is a power transmission device that transmits the power of the engine 12 to the rear wheel 18. The power of the engine 12 is input to the rear axle 15 via the transmission 13.

  The cockpit 16 is a cockpit in which various operation tools are arranged. In addition to the above-described shift pedal 161 and handle 162, the cockpit 16 is provided with other operating tools used for driving the rice transplanter 100.

  The work machine 2 mainly includes a seedling stage 21, a planting mechanism 22, and a float 23.

  The seedling stage 21 is a seedling supply device that supplies the seedling S to the planting mechanism 22. The mat seedlings (a collection of seedlings S germinated so that roots are entangled with each other using a nursery box) placed on the seedling stage 21 are appropriately sent to the planting mechanism 22 by the vertical feed mechanism. The seedling stage 21 is slidably mounted on a rail provided on the planting frame, and reciprocates in the left-right direction in accordance with the operation of the planting mechanism 22. In this way, the seedling stage 21 can supply the seedling S to the planting mechanism 22.

  The planting mechanism 22 is a seedling planting device for planting the seedling S in the field. The planting mechanism 22 includes a mission case 221 and a transmission case 222 that convert the power of the engine 12 into a planting operation, and a planting claw 223 that holds the seedling S and is planted in the field. The transmission case 221 and the transmission case 222 rotate the planting arm 224 to which the planting claw 223 is attached. Since the planting claw 223 rotates together with the planting arm 224, the fork 223a can scrape the seedling S from the mat seedling and hold the seedling S. Moreover, since the planting claw 223 pushes out the seedling S held by the rod 223b when rotated downward, the seedling S can be planted in the field. In the present embodiment, a so-called rotary drive system is adopted in which the planting claws 223 are driven to rotate together with the planting arms 224. However, a so-called crank in which a mechanism portion composed of a plurality of cranks drives the planting claws. A drive system may be used.

  The float 23 is a planting depth adjusting device that adjusts the planting depth of the seedling S by raising and lowering the work machine 2. The float 23 is also a support device for the seedling stage 21 and the planting mechanism 22 described above. The float 23 includes a center float 231 disposed at the center portion of the work machine 2 and side floats 232 disposed on both sides of the center float 231 (see FIG. 3). The position sensor provided in the center float 231 moves the working machine 2 up and down to an appropriate height in conjunction with the control device of the traveling machine body 1. Further, since the center float 231 and the side float 232 have a smooth bottom surface in contact with the field, it is possible to level the field (level the farm scene). As described above, the center float 231 and the side float 232 constituting the float 23 can adjust the planting depth of the seedling S by leveling the farm field and raising and lowering the work machine 2.

  The lift link mechanism 3 is mainly composed of an upper link 31, a lower link 32, and a hydraulic actuator (not shown).

  The upper link 31 and the lower link 32 are connecting devices that connect the traveling machine body 1 and the work implement 2. The upper link 31 and the lower link 32 are also lifting devices that lift and lower the work machine 2. A hydraulic actuator (not shown) expands and contracts in response to the instruction from the control device described above, and drives the upper link 31 and the lower link 32. Thus, the upper link 31 and the lower link 32 can raise and lower the work implement 2 based on the operation by the operator and the signal from the position sensor.

  Next, the center float 231 that is a feature of the present invention will be described.

  FIG. 3 is a perspective view showing the center float 231 and the side float 232. 4, 5, 6, and 7 are a top view, a front view, a side view, and a rear view showing the center float 231. FIG. 8 is a perspective view showing a situation where the bulging portion 231b of the center float 231 levels the soil mass M. FIG. In addition, the arrow F in a figure has shown the traveling direction of the rice transplanter 100, ie, the advancing direction of the center float 231 and the side float 232. FIG. Moreover, the arrow Wc and the arrow Ws in a figure have shown the flow direction of the water stretched on the agricultural field. Furthermore, the area | region R in a figure has shown the position where the planting mechanism 22 plants the seedling S. FIG.

  First, the shapes of the center float 231 and the side float 232 will be described in detail.

  The center float 231 is formed symmetrically. As shown in FIGS. 3 and 4, the center float 231 has a shape in which a substantially triangular front part and a substantially rectangular rear part are joined together. The center float 231 is divided into a main body portion 231a constituting a central portion and a bulging portion 231b constituting both sides of the main body portion 231a. As shown in FIG. 6, the main body portion 231a has a shape in which the end portion on the traveling direction side is warped upward (see the portion G1 in FIG. 6). The bulging portion 231b also has a shape in which the end portion on the traveling direction side is warped upward (see portion G2 in FIG. 6). The main body 231a is provided with mounting portions 231c and 231c on the upper surfaces of the front and rear portions. The bulging portion 231b is formed with a thin plate-shaped portion 231d that is recessed to the bottom at the tip.

  The side floats 232 are formed bilaterally symmetrical. As shown in FIGS. 3 and 4, the side float 232 is formed in a substantially U shape. Moreover, as shown in FIG. 6, the side float 232 has a shape in which the traveling direction side end is warped upward. The side float 232 is provided with attachment portions 232f and 232f on the upper surface of the central portion thereof. Further, as shown in FIG. 4, the side float 232 is formed with recesses 232 e and 232 e in accordance with the position of the bulging portion 231 b of the center float 231. For this reason, the side float 232 does not interfere with the thin plate-shaped portion 231d of the center float 231. Further, it is possible to eliminate the unleveled portion by overlapping the leveling range Dc of the center float 231 and the leveling range Ds of the side float 232 (see FIGS. 5 and 7).

  Below, the technical idea and effect of the center float 231 characterized by the shape mentioned above are demonstrated in detail.

  As a first feature point, the center float 231 has a bulging portion 231b extending from the main body portion 231a of the center float 231 to the side float 232 side. More specifically, the center float 231 is formed with a bulging portion 231b so as to narrow the gap between the side floats 232 disposed on both sides of the center float 231.

  Thus, since the center float 231 has the bulging part 231b extended from the main-body part 231a of the center float 231 to the side float 232 side, the leveling range Dc can be expanded (refer FIG. 5, FIG. 7). That is, the rice transplanter 100 according to the present embodiment can expand the leveling range Dc by the center float 231 as compared with the conventional rice transplanter. Thereby, the rice transplanter 100 can reduce the rough terrain portion formed between the center float 231 and the side float 232, and can level the soil mass M such as the soil mass M and wheel marks that the center float 231 has pushed away. It becomes.

  Further, the center float 231 has a shape in which the end portion in the traveling direction of the bulging portion 231b is warped upward. More specifically, the center float 231 has a design in which the end portion in the traveling direction of the bulging portion 231b warps upward like a warp. This is for crushing the soil mass M that the main body portion 231a has pushed away during the planting operation and leveling the soil mass M.

  Thus, since the center float 231 has a shape in which the end portion in the traveling direction of the bulging portion 231b is warped upward, the mass M that the main body portion 231a has pushed away can be leveled by the bulging portion 231b (FIG. (Refer to L part in 8). That is, the rice transplanter 100 according to the present embodiment can obtain the same effect even though the center float 231 and the side float 232 are not integrally formed. By these, the problem that weed grows in the soil mass M which appeared on the water surface can be improved.

  As a second feature point, the center float 231 has a thin plate shape (thin plate shape portion 231d) in the proximity of the bulging portion 231b to the side float 232. More specifically, the center float 231 has a design in which a part of the bulging portion 231b adjacent to the side float 232 is thinly formed. This is to make the upper surface of the thin plate-shaped portion 231d part of the flow path through which water flows (see arrow Wc). Note that the thickness dimension T of the thin plate-shaped portion 231d is set as small as possible within a range that satisfies design elements such as strength and productivity (see FIG. 7).

  Thus, since the center float 231 has a thin plate shape (thin plate shape portion 231d) in the proximity of the bulging portion 231b to the side float 232, a wide water flow path can be secured (see FIGS. 3 and 4). . That is, the rice transplanter 100 according to the present embodiment can ensure a wide flow path of water despite having the bulging portion 231b in the center float 231. This weakens the water flow (around the center float 231 and side float 232 from the front of these floats 23 and flows backward from the side of these floats 23: see the arrow Ws), It can prevent falling.

  As a third feature point, the center float 231 has an increase in buoyancy due to the shape of the end of the bulging portion 231b in the advancing direction and the upper surface of the thin plate portion 231d of the bulging portion 231b. Balances the increase in load due to flow. More specifically, the center float 231 has an increase in buoyancy due to the shape of the end of the bulging portion 231b in the traveling direction being warped upward, and water flows on the upper surface of the thin plate portion 231d of the bulging portion 231b. It is designed so that the increase in load due to this is equally balanced. This eliminates the instability that affects the planting depth of the seedling S due to the fact that the end portion in the traveling direction of the bulging portion 231b is warped upward. Specifically, the shape of the bulging portion 231b and the area of the thin plate-shaped portion 231d are designed as parameters.

  As described above, the center float 231 has an increase in buoyancy due to the shape in which the advancing direction end of the bulging portion 231b is warped upward, and water flows on the upper surface of the thin plate-shaped portion 231d of the bulging portion 231b. Since the increase in load is balanced, the behavior of the center float 231 can be stabilized. That is, the rice transplanter 100 according to the present embodiment can stabilize the behavior of the center float 231 despite the fact that the advancing direction side end of the bulging portion 231b is warped upward. Thereby, in the rice transplanter 100, the center float 231 and the like can accurately move the working machine 2 up and down to appropriately adjust the planting depth of the seedling S.

  In addition, the rice transplanter 100 provided with the center float 231 and the side float 232 arrange | positioned at the both sides of this center float 231 is compared with the seedling plant S compared with the rice transplanter which formed the center float 231 and the side float 232 integrally. It is possible to adjust the planting depth appropriately. This is because the planting depth of the seedling S can be stabilized because the height from the farm scene to the planting mechanism 22 is substantially constant in the left-right direction.

DESCRIPTION OF SYMBOLS 100 Rice transplanter 1 Traveling machine body 11 Car body frame 12 Engine 13 Transmission 14 Front axle 15 Rear axle 16 Cockpit 17 Front wheel 18 Rear wheel 2 Work machine 21 Seedling stand 22 Planting mechanism 223 Planting claw 223a Fork 223b Rod 23 Float 231 Center float 231a Main body portion 231b Swelling portion 231d Thin plate shape portion (thin plate shape)
232 Side float 232e Concavity Dc Leveling range Ds Leveling range S Seedling Wc Water flow direction Ws Water flow direction

Claims (3)

In a rice transplanter comprising a center float and side floats arranged on both sides of the center float,
The center float has a bulging portion extending from the main body portion of the center float to the side float side, and the main body portion has a shape in which the end portion in the traveling direction of the bulging portion is warped upward. a clod of displacement configured to Hitoshi Suyo,
In accordance with the position of the bulging portion of the center float, a recess is formed at the side end of the side float,
The bulging part of the center float and the concave part of the side float are arranged so as to face each other.
Rice transplanter characterized by that.   2. The rice transplanter according to claim 1, wherein the center float has a thin plate shape in a portion adjacent to the side float of the bulging portion to secure a water flow path. The center float increases the buoyancy of the center float by configuring the bulge portion.
The load of the center float is increased by flowing water through the upper surface of the thin plate-shaped portion of the bulging portion, and the increase in the buoyancy and the increase in the load are balanced. Rice transplanter as described in

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